Below is a video of a pushup variation that many will find useful.
Perhaps more impressive however is the fact that the man seen within the video was born in 1941!
As for the exercise itself, the dot drill mat seen in video retails for $69.95. Those looking for a cost friendly alternative may wish to use an anti-fatigue mat instead. Such mats are easy to find. Home Depot sells anti-fatigue mats in the carpet area. They are 36 inches wide and are cut to your desired length. You can see an old mat (purchased from Home Depot) in the image below.
The picture is 4+ years old, and the mat is a few years older. At the time, it sold for around 3 dollars per foot. I’m guessing the price has gone up slightly, but you’ll still save a significant amount of money when compared to the real deal. You could then paint your own dots.
Such mats can also be useful for exercises such as jumping rope (for those who train on cement floors). Horse stall mats can also be used, but are usually more expensive than the anti-fatigue mats.